Frame for concrete columns



May 7, 1935. w. H; WHEELER 2,000,543

FRAME 'FOR CONCRETE COLUMNS Original Filed Nov. 3, 1930 ray/MM Patented May 7, 1935 UNITED STATES PATENT OFFICE 2,000,543 mam: roa ooncac'm COLUMNS Walter H. Wheeler, Minneapolis,. Minn assignor to Frank K. B. Wheeler, Minneapolis,

Application November 3, 1980,- Serial No. 493,053 Renewed February 10, 1934 11 Claims.

This invention relates to reinforced concrete constructions at the junctures between columns and floor slabs thereof to better and more durably support the floor slabs from the' columns, and to at the same time resist shearing strains at and adjacent to the locations of jointures between columns and floor slabs.

The main object of the present invention is to provide a frame for supporting a floor slab upon a concrete column which will beof the novel and improved structure and will function in the novel and improved manner hereinafter set forth, and which will constitute an improvement generally overmore or less similar devices nowof commerce.

A more specific object is to provide a floor slab supporting frame adapted to be disposed entirely within said floor slab, preferably centrally above a supporting column therefor, said supporting frame desirably in effect comprising a plurality of sets of spaced apart bars intersecting each other adjacent the central portions'of said sets, or at location directly above said column, and including extensions of said bars adapted to protrude horizontally beyond each of the vertical or upright sides of the column, preferably to positions within said slab at considerable distance from said column, to thus most satisfactorily and emciently support the floor slab upon the column with but a minimum of shearing strain at and adjacent to the location of jointure between column and floor slab.

-A further specific object is to provide a supporting frame as stated, which will include desirably vertical protuberances or lugs projectin from said supporting frame and adapted to be imbedded in the -floor slab, and also desirably adapted to be imbedded in the column.

'And a still further specific. object is to provide a floor slab supporting frame composed of a single piece of metal providing said plurality of sets of spaced apart bars, which bars are desirably parallel and are of I-beam construction. and which sets preferably intersect each other at right-angles.

With the above objects in view, as well as others which willappear as the specification proceeds, the invention will now be fully described and will hereinafter be specifically claimed.

In the accompanying drawing forming a part of this specification, and in which like reference characters indicate like parts throughout the several views,

Fig. l is a plan view, partially sectioned and partially broken away, of a frame for concrete columns made in accordance with the invention; v

Fig. 2 is an edge elevational view of the frame of Fig. 1;

Fig. 3 is a plan view of the frame, this view showing, in dotted lines, a concrete column beneath the frame, and also disclosing the horizontal reinforcing. rods to be floor slab; and

Fig. 4 is a vertical sectional view, taken as on line 44 in Fig. 3, showing the floor slab and an upper continuation of the column, omitted from Fig. 3, in section.

imbedded in the With respect to the drawing and the numerals of reference thereon, Ill represents a vertical or upright concrete column, denotes a concrete floor slab supported thereby, and I2 indicates a supporting frame arranged centrally above the supporting column, as will be more clear. from Figs. 3 and 4.

The supporting frame I2 is, asshown in Fig. 4, disposed within the floor slab, and comprises a plurality of sets, designated l3 and ll, of spaced apart bars. While different numbers of said sets may be used, in the embodiment of the invention illustrated, two sets are shown. These bars intersect each other adjacent 'the central portions of the sets to provide an open body of the frame arrranged centrally thereof, said body as disclosed constituting an open square defined by the midlength portions l5 of said bars l3 and I4. De-

sirably, although not necessarily, the supporting frame I! is composed of a single piece of metal,

the different sets I 3,14 of bars intersect each other at right-angles, and the bars of each set are parallel. Each bar of the sets I3 and H is desirably of I-beam form in cross section as best shown in Figs. 1, 2 and 4, and said supporting frame constitutes an integral structure, as best shown at the location of the section in Fig. 1.

Each bar of the sets l3 and H includes horizontal extensions protruding beyond the body of the supporting frame defined by the portions l5, and, preferably, the said extensions of all of the bars are of equal length. In practice, the body of the supporting frame, defined by the portions I5, is of dimension to rest upon the upper end of a constructed column, such as ll, preferably well within the confines of said column as disclosed in Fig'. 3, while the horizontal extensions of the bars beyond the portions [5 are of length to protrude beyond the vertical or upright sides of the column, preferably topositions within the floor slab at considerable distance from said column. See Figs. 3 and 4.

The building construction as illustrated desirably includes,in addition to the supporting frame I2, horizontal reinforcing rods lhand l1 imbedded in the concrete of the floor slab II and running over the top of the frame, the reinforcing rods l6 being approximately parallel to the bars of the set I3 and the reinforcing rods I! being perpendicular to the rods l6 and approximately parallel to the bars of the set N. Also, the present construction'desirably includes vertical reinforcing rods l8 imbedded in the concrete column I0 and projecting between the bars of the supporting frame and past the reinforcing rods l6 and I1.

When erecting a building including'fioor slabs such as H, the columns, such as I0, are usually first built up to a floor to be constructed, and the concrete to provide the floor, or a part thereof, is then poured. In the present instance, a supporting frame I! will be arranged upon each column III to support the floor in about the manner as shown in Fig. 3, and when the forms for the concrete to provide the floor are ready,

the concrete will be poured, and afterwards leveled off, it being of course understood that the reinforcing rods l8 are positioned in the column form before the concrete for providing the column is poured, as are also the reinforcing rods i6 and I l positioned in the floor or slab form before the concrete for providing the floor or slab is poured. In the completed structure, the supporting frames are all entirely imbedded in the columns or floor slabs, as are also the reinforcing rods l6, l1 and I8.

The bars of the supporting frame desirably include vertically projecting protuberances or lugs adapted to be imbedded inthe floor'or slab and in the column. As disclosed, each bar of the supporting frame includes integral downwardly extending protuberances or lugs I9 adjacent its outer ends. These lugs I 9 rest 'uponthe floor form and support the frame before the concrete is poured. These lugs are of course imbedded in the floor slab. Each baralso includes upwardly extending posts or members 20 and II intermediate the ends of the bar imbedded in the column, the protuberances or lugs 20 and 2|, being directly opposite each other.

After a floor including a slab such as it is completed, the form for the concrete column is built up as is the form for the next higher floor to be made. See the portion of the built up column above the floor slab I I in Fig. 4.

The body of the supporting frame is'located slightly above the bottom. of the slab, due to engagement of the protuberances orlugs IS with the base of the form for the concrete to provide the slab. and the poured concrete flows beneath the body of the supporting frame, as well as about floor slab upon the central portion of the upper end of the column, and thus, practically speak ing, eliminates all shearing strains upon the column, as well as upon the floor slab. The supporting frame being firmly united with the column by the concrete in which said frame is imbedded and centrally arranged or balanced upon said column, and extending horizontally beyond each wall of the column, provides a rigid carrier of relatively great expanse for the slab, which carrier evidently greatly strengthens the structure, particularly at and adjacent to the locations where the column and the floor slab meet. At

the same time, the supporting frame is of construction and dimensions to lie wholly within the floor slab without necessity for thickening said slab beyond the thickness i-t ordinarily requires. Said supporting frame can find use with any ordinary or preferred type of column, such as 12, and eliminates any necessity for having a bracing or diagonal portion extending outwardly adjacent the top of the column to the floor.

The supporting frame of the invention can be very economically manufactured. Obviously, it is carried to the location of building construction and there incorporated into the structure, no preliminary assemblies being required. When employing my arrangement as shown and described, all that is necessary is to properly place the supporting frames and reinforcing rods in the forms when these are ready, and then pour the concrete.

It is to be understood that the supporting frame l2 can include any number of bars to each set, such as I3 and M, as may in a particular case be preferred, as well as include a number of sets of bars greater'than two, and the construction can include a greater or a less number of reinforcing rods l6, l1 and I8 than shown.

While-I have preferred to illustrate and describe a single embodiment of the invention, it is to be understood that the disclosure herein is merely illustrative and intended in no way in a limiting sense, changes in details of construction and arrangement of parts being permissible so long as within the spirit of the invention and the scope of the claims which follow.

WhatIclaim is: Y

1. An integral frame for supporting a floor slab upon a concrete column, comprising a plurality of sets of spaced apart, parallel bars, which sets intersect each other at right-angles-adjacent the central portions of said sets, said sets of bars providing a body portion of said frame of polygonal form adapted to be disposed centrally above said column and a free extension of said bar projecting beyond said body portion and adapted to extend beyond the walls of said column.

2. The combination with a' concrete column and a floor slab supported thereon, ofv a supporting frame comprising a plurality of intersecting sets of spaced apart bars disposed in one plane and providing a body portion of said frame disposed in said floor slab centrally above said column and said bars having free extensions disposed in said floor slab and projecting beyond said body portion and the walls of said column to form a crossshaped frame, reinforcing rods imbedded in said floorslab and spanning the top of said-framaand reinforcing rods imbedded in said column and projecting between the bars of said frame and past the reinforcingrods in said floor slab.

3. The combination'with a concrete column and a floor slab supported thereon, of'a supporting frame comprising a plurality of intersecting pairs said frame having a central opening disposed in said floor slab centrally above said column said bars extending beyond said column so as to be disposed in said floor slab, and reinforcing rods imbedded in said column and projecting between the bars of said frame and through said central opening.

4. A frame for a concrete column head adapted to be disposed in the floor slab centrally over said column comprising an integral member formed of two pairs of slightly spaced bars of I-beam form in cross section, said bars being disposed in the same horizontal plane and intersecting at right angles.

5. A rigid integral frame for supporting a floor slab upon a concrete column comprising two pairs of spaced apart bars of greater height than width, said pairs intersecting at right angles adjacent their central portions to form a symmetrical frame of general cross shape having a central opening surrounded by a square formed of saidbars.

6. A frame for supporting a floor slab upon a concrete column, comprising a plurality of intersecting sets of spaced apart bars disposed in a. common plane providing a body portion of said frame adapted to be disposed centrally above said column, free extensions of said bars extending beyond said body portion and adapted to extend beyond the walls of said column, and lugs upon said bars at their intersections adapted to support said frame in the floor form and to be 1mbedded in the concrete of said floor slab.

7. A rigid integral frame for supporting a floor slab on a concrete column comprising a plurality of pairs of spaced parallel bars each being of angular shape in transverse cross section, said bars being disposed in one plane and intersecting each other at right angles to form a symmetrical cross-shaped frame, said frame having pin-like lugs extending upwardly and downwardly therefrom at-the intersections of said bars. I

8. A rigid integral frame for supporting a floor slab upon a concrete column comprising a plurality of pairs of spaced parallel bars, said bars intersecting each other at right angles adjacent their central portions, thus forming a symmetrical cross-shaped frame with the ends of said bars projecting freely at four sides thereof.

9. A frame forsupporting a floor slab upon a concrete column comprising an integral frame composed of a plurality of intersecting sets of spaced bars disposed in a common plane, said 'bars including single free extensions thereof adapted to extend horizontally beyond each of the walls of said column, said frame having a central opening therein.

10. The combination with a concrete column and a floor slab extending outwardly therefrom, of an integral frame comprising a central portion having a central opening therethrough, the central axis of which opening is substantially coincident with the central axis of said column, said frame comprisinga plurality of spaced rigid bars projecting outwardly therefrom in opposite directions and having other bars extending outwardly therefrom in opposite directions substantially at right angles to said first mentioned bars, all of said bars being of considerable height and adapted to act as cantilevers to transmit the load of said floor slab directly to said column by shear stress. v

11. A device for supporting a floor slab upon a column of concrete construction comprising an integral metal frame having a central portion with a central opening extending vertically therethrough of comparatively large area, and a plurality of rigid bars integral with said frame and each having considerable height thus having great strength in shear and when acting as a beam, said bars extending outwardly from said frame into said slab and acting as cantilevers for supporting the .load of said floor slab and transmitting the same directly to said column by shear stress.

WALTER H. WHEELER. 

